# HALOWERK Nordic Land – Iceland Soil Sand Fraction (0-5 cm)

> HALOWERK Nordic Land – Iceland Soil Sand Fraction (0-5 cm) is a paid API for AI agents from nordland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids sand fraction percentage for the 0-5 cm soil layer at a given WGS84 coordinate within Iceland.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/is-soil-sand
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-nordic-land-iceland-soil-sand-fraction-0-5-cm-f7accbc5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GRe9ZEO58Hnqii9UUOPPn

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability halowerk-nordic-land-iceland-soil-sand-fraction-0-5-cm-f7accbc5 -d '<json body>'
```

Example prompt: What is the mean sand fraction in the top 0-5 cm of soil at latitude 64.13, longitude -21.93 in Iceland?

## When to prefer this

Choose this endpoint when you specifically need SoilGrids-derived sand fraction data for the 0-5 cm topsoil layer at a point location within Iceland. It is purpose-built for Iceland with boundary validation before billing, making it ideal for Icelandic geospatial, agricultural, or environmental workflows. For other soil properties (silt, clay, pH, organic carbon) or for other countries, use sibling endpoints on the same platform.

## Known failure modes

- Coordinate outside Iceland boundary — request rejected before payment with a validation error
- Coordinate within the broader European bounding box but outside Iceland polygon — rejected
- Missing or out-of-range latitude/longitude — schema validation error
- SoilGrids data unavailable for the specific cell — may return null or no-data value
- Network timeout or upstream SoilGrids service unavailability

## How this service works

Mean SoilGrids sand fraction for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Iceland; results outside it are rejected before payment.

## Output

A numeric mean sand fraction value (percentage or volumetric proportion) for the 0-5 cm topsoil layer at the queried coordinate, sourced from SoilGrids. Coordinates outside the Iceland boundary are rejected before any charge is applied.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "maximum": 72.5,
   "minimum": 34,
   "description": "WGS84 latitude inside the published European coverage."
  },
  "longitude": {
   "type": "number",
   "maximum": 40.5,
   "minimum": -31.5,
   "description": "WGS84 longitude inside the published European coverage."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-nordic-land-iceland-soil-sand-fraction-0-5-cm-f7accbc5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)